I have removed all Spoiler Tags.
I didn't notice DocPete, but I did hear the Haunted Mansion theme during Riley's nightmare and saw the board game in Imagination Land with a picture of Nemo called 'Find Me'.
About the Chinatown reference, what about the bigger question of people who believe the equation that Animated Films = Kids Films? How easy is this going to be to understand if you're not at the age Riley is in the film? Those concepts, especially the resolution of them, can't possibly make sense to someone who hasn't gone through them yet. (This is not another of my crazy reasons against the film. I like this aspect a lot.)
Corndog, I believe that will be the common wisdom.